Can't access Pages Help

I bought iWork 09 last year and it has worked fine on G4 MacMini OSX10.4.11. However, in the last few days I have found that when I click on the Help button on the toolbar, the Help window comes up empty and a Safari window opens up with the following error message:

Not Found

The requested URL /pageshelpr5/English/PagesHelp.html was not found on this server.

Apache/2.2.3 (Oracle) Server at help.apple.com Port 80

I wonder if anyone else has experienced this and can offer a solution?
Thanks
Peter